Uh, ok. Not much we can do to help without any additional info. The T3i has been working for years now.
Do you get an error message?
Does Windows see the camera?
Did you try another USB cable?
Did you try another USB port?
What version of BYE?
Did it ever connect with that camera?
Which Canon drivers are you using in BYE when connectiong the camere? Canon/Canon215/Canon2010?
Regards,

USB cable deteriorate over time... good quality cables like TetherTools will last longer and they have slightly bigger strands usually and better interference protection.
Try a less expensive cable at first if you have one and buy the more expensive one only if you have issues with the less expensive generic cable.

Be it as it may, It's Nikon's SDK. The have improved the most current SDK (called Nikon in BYN) dramatically in recent years to the point where even older cameras will now connect... it was not the case a few years ago... hence the need to be backward compatibility by including the Nikon2015 SDK version in BYN.

Oh, I missed that. Can you please post this a feature request in the Feature Suggestion Box forum. This is where I go when I some time to spare. This way it won't get lost in the forum as a regular thread.
I'll read the ASCOM documentation they have.

I got your PM. In the future post things here in the forum. PM's not public and provides no continuity for the community as a whole.
Everything you sent me seems related to the actual manufacturer of the sensor... this is not useful as the Pegasus device had complete control over it. If the Pegasus device does not allow to periodically write the current data to a file there is nothing that can be done. Can the Pegasus write this to a file periodically? If yes what is the file format, this is what I need.

This should actaully by the in the "Feature Suggestion Box" box forum.
Send me sample file of what the Pegasus units write and I'll see if I can help you configure the text file delimiter for it.
Regards,